No; you can not get a STD from a person that doesn't have it.
No. If your partner is uninfected, then you'll be fine.
the only way someone can get an std is being unsafe and performing sex acts with infected people
Unless it has an STD, then no it is harmless.
No.
somewhere around 0%
No, but it could give you an STD.
This would not be good to do as many STDs can be contracted in the mouth.
No, you will not die from eating sperm. Swallowing semen is perfectly safe, as long as he doesn't have and STD.
If you are 100% sure he has never had any sexual contact with anyone, that would include oral (sucking), then no neither of you can give the other an STD.
Swallowing semen from a disease-free male during sex is generally safe. There is nothing unhealthy about swallowing unless the person has an STD.
Yes no harm in digesting semen. Studies link a possible reduction in breast cancer in swallowing semen on a regular basis. As long as the man doesn't have a STD.
It simplifies oral sex, and the physical sensations of swallowing usually feel good to the inserting partner. The person who swallows the semen will not be affected, positively or negatively. Semen is mostly protein, and breaks down quickly in stomach acid.
Probably not, it contains sugars and proteins so it won't do you any harm provided the person whose semen you swallow doesn't have an STD, such as HIV or AIDs.
As long as the other boy doesn't have an extremely major sexually transmitted disease, chances are that swallowing it will do no harm. Even if the other boy has a light form of an STD, the chances of it being transferred successfully to you just by swallowing it is extremely slim. In fact, swallowing semen is perfectly sterile and healthy. In fact, it contains proteins and other minerals that are good for you. Although these nutrients are minute, there surely aren't any disadvantages to swallowing semen. So no need to worry if you were forced to drink someone's semen.